270 lines
6.8 KiB
Lua
270 lines
6.8 KiB
Lua
--Rover for rocket mod
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-- Parameters
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local ACDC = 0.15 -- Acceleration / decelleration
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local TURNSP = 0.02 -- Maximum yaw speed
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-- Functions
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local function get_sign(i)
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if i == 0 then
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return 0
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else
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return i / math.abs(i)
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end
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end
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local function get_velocity(v, yaw, y)
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local x = -math.sin(yaw) * v
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local z = math.cos(yaw) * v
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return {x = x, y = y, z = z}
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end
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local function get_v(v)
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return math.sqrt(v.x ^ 2 + v.z ^ 2)
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end
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-- Rover entity
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local rover = {
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physical = true,
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collide_with_objects = true,
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--collisionbox = {-0.7, 0.4, -0.7, 0.7, 1.0, 0.7},
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--collisionbox = {-1.6, 0.0, -1.0, 1.4, 3.0, 3.5},
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collisionbox = {-1.0, 0.0, -1.0, 1.0, 3.0, 1.0},
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visual = "mesh",
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mesh = "rover.obj",
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visual_size = {x = 1.0, y = 1.0, z = 1.0},
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textures = {"rover.png"},
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stepheight = 0,
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driver = nil,
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v = 0,
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last_v = 0,
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removed = false,
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}
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-- Rover item
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minetest.register_craftitem("rocket:rover", {
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description = "Rover",
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inventory_image = "rover.png",--"rocket_rover_front.png",
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--wield_scale = {x = 2, y = 2, z = 2},
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on_place = function(itemstack, placer, pointed_thing)
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local under = pointed_thing.under
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local node = minetest.get_node(under)
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local udef = minetest.registered_nodes[node.name]
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if udef and udef.on_rightclick and
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not (placer and placer:get_player_control().sneak) then
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return udef.on_rightclick(under, node, placer, itemstack,
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pointed_thing) or itemstack
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end
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if pointed_thing.type == "node" and
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minetest.registered_nodes[node.name].walkable then
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under.y = under.y + 1.5 --0.5
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local rover = minetest.add_entity(under, "rocket:rover")
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if rover then
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rover:setyaw(placer:get_look_horizontal())
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if not minetest.settings:get_bool("creative_mode") then
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itemstack:take_item()
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end
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end
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end
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return itemstack
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end,
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})
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-- Register entity
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minetest.register_entity("rocket:rover", rover)
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-- Rover entity functions
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function rover:on_rightclick(clicker)
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if not clicker or not clicker:is_player() then
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return
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end
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local name = clicker:get_player_name()
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if self.driver and clicker == self.driver then
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self.driver = nil
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clicker:set_detach()
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default.player_attached[name] = false
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default.player_set_animation(clicker, "stand" , 30)
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elseif not self.driver then
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local attach = clicker:get_attach()
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if attach and attach:get_luaentity() then
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local luaentity = attach:get_luaentity()
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if luaentity.driver then
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luaentity.driver = nil
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end
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clicker:set_detach()
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end
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self.driver = clicker
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clicker:set_attach(self.object, "",
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{x = 0, y = 12, z = -10}, {x = 0, y = 0, z = 0})
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default.player_attached[name] = true
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minetest.after(0.2, function()
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default.player_set_animation(clicker, "sit" , 30)
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end)
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clicker:set_look_horizontal(self.object:getyaw())
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end
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end
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function rover.on_activate(self, staticdata, dtime_s)
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self.object:set_armor_groups({immortal = 1})
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if staticdata then
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self.v = tonumber(staticdata)
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end
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self.last_v = self.v
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end
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function rover.get_staticdata(self)
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return tostring(self.v)
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end
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function rover.on_punch(self, puncher, time_from_last_punch,
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tool_capabilities, direction)
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if not puncher or not puncher:is_player() or self.removed then
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return
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end
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if self.driver and puncher == self.driver then
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self.driver = nil
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puncher:set_detach()
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default.player_attached[puncher:get_player_name()] = false
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end
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if not self.driver then
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self.removed = true
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local inv = puncher:get_inventory()
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if not minetest.setting_getbool("creative_mode")
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or not inv:contains_item("main", "rocket:rover") then
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local leftover = inv:add_item("main", "rocket:rover")
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-- If no room in inventory add a replacement rover to the world
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if not leftover:is_empty() then
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minetest.add_item(self.object:getpos(), leftover)
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end
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end
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-- Delay remove to ensure player is detached
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minetest.after(0.1, function()
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self.object:remove()
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end)
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end
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end
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function rover:on_step(dtime)
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local ctrl
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if self.driver then
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ctrl = self.driver:get_player_control()
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end
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if (not ctrl or not (ctrl.up or ctrl.down)) and
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vector.equals(self.object:getvelocity(), {x = 0, y = 0, z = 0}) then
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-- Either no driver or driver but no accelerator, and stationary
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return
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end
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-- Touching ground?
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local obj_pos = self.object:getpos()
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obj_pos.y = obj_pos.y - 1.1
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local under_pos = obj_pos
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local node_under = minetest.get_node(under_pos)
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local nodedef_under = minetest.registered_nodes[node_under.name]
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local touch_ground = nodedef_under.walkable
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local absv = get_v(self.object:getvelocity())
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self.v = absv * get_sign(self.v)
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if touch_ground then
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-- Acceleration and steering
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if self.driver then
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if ctrl.up then
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self.v = self.v + ACDC
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elseif ctrl.down then
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self.v = self.v - ACDC
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end
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local turn
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local maxturn = (1 + dtime * 2) * TURNSP
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if absv < 4 then
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turn = maxturn * absv / 4
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else
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turn = maxturn * (1 - (absv - 4) / 8)
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end
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if ctrl.left then
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self.object:setyaw(self.object:getyaw() + turn)
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elseif ctrl.right then
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self.object:setyaw(self.object:getyaw() - turn)
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end
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end
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-- Slowing from resistence
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local s = get_sign(self.v)
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self.v = self.v - 0.04 * s
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if s ~= get_sign(self.v) then
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self.object:setvelocity({x = 0, y = 0, z = 0})
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self.v = 0
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return
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end
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-- Limit to max speed
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if absv > 8 then
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self.v = 8 * get_sign(self.v)
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end
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end
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-- Vertical behaviour
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local obj_pos = self.object:getpos()
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obj_pos.y = obj_pos.y - 0.5
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local nodedef_in = minetest.registered_nodes[minetest.get_node(obj_pos).name]
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if nodedef_in.walkable then
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-- In node, jump up
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self.object:setacceleration({x = 0, y = 0, z = 0})
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self.object:setvelocity(get_velocity(self.v,
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self.object:getyaw(), math.max(absv / 2, 1)))
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self.object:setpos(self.object:getpos())
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else
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if not touch_ground then
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-- No node under, freefall
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self.object:setacceleration({x = 0, y = -1.962, z = 0})
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self.object:setvelocity(get_velocity(self.v, self.object:getyaw(),
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self.object:getvelocity().y))
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self.object:setpos(self.object:getpos())
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else
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-- Node under, on surface, check y velocity
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if self.object:getvelocity().y < 0 then
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-- Landing on surface
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local pos = self.object:getpos()
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pos.y = math.floor(pos.y) + 0.5
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self.object:setacceleration({x = 0, y = 0, z = 0})
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self.object:setvelocity(get_velocity(self.v, self.object:getyaw(), 0))
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self.object:setpos(pos)
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else
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-- On surface or jumping up through surface
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self.object:setacceleration({x = 0, y = 0, z = 0})
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self.object:setvelocity(get_velocity(self.v, self.object:getyaw(),
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self.object:getvelocity().y))
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self.object:setpos(self.object:getpos())
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end
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--if node_under.name == "rocket:dust" or
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-- node_under.name == "rocket:dustprint1" or
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-- node_under.name == "rocket:dustprint2" then
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-- minetest.set_node(under_pos, {name = "rocket:dusttrack"})
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--end
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end
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end
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end
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